AirHint found the following cheapest return flights from London (LHR) to San Jose (SJO) in August 2025 (see full year).

Return flights

30 Aug - 30 Sep	United
31 Aug - 16 Sep	United
30 Aug - 05 Sep	United
29 Aug - 19 Sep	Air France
25 Aug - 15 Sep	Air France
29 Aug - 06 Sep	United
29 Aug - 08 Sep	United
28 Aug - 04 Sep	Brussels Airlines
27 Aug - 05 Sep	Brussels Airlines
28 Aug - 05 Sep	Brussels Airlines
28 Aug - 31 Aug	Brussels Airlines
24 Aug - 31 Aug	United
26 Aug - 31 Aug	United
27 Aug - 29 Aug	Eurowings
25 Aug - 31 Aug	TAP
25 Aug - 29 Aug	TAP
25 Aug - 27 Aug	Avianca
24 Aug - 27 Aug	Avianca
26 Aug - 29 Aug	British Airways

Also check the deals for one-way flights from London to San Jose in August.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from London to San Jose in August from $831

Return flights